1908. You are in the planning stages of replacing a battery room ventilation fan drive motor located outside of but within 5 feet of the end of the exhaust duct. According to 46 CFR, Subchapter J (Electrical Engineering), what type of motor in terms of enclosure type must be used as a replacement?

46 CFR Subchapter J requires explosion-proof motors in hazardous locations, such as those near battery room exhaust ducts where hydrogen gas may be present. Motors located within 5 feet of the exhaust duct are considered within the hazardous zone and must be explosion-proof to prevent ignition of the surrounding atmosphere; other enclosure types are unsuitable.